Acer Aspire monitor problems

Hi, I have been having some technical difficulty's lately with my Acer ASPIRE's monitor. I will be watching a video, doing work or making one of my games when my monitor will go to black-and-grey lines. So far, the only way to postpone the problem is (Once Problem has occurred) to hit the CTRL-ALT-DEL keys, which will bring to the Windows 7 Options Menu. Then just close that... But it will happen again and the fix is rendered useless I then have to restart my laptop. Any ideas? Please comment!​
 
I think this may be a graphics card issue. Please tell me your system specs (CPU, Graphics card, OS - 32 or 64bit).
 
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I think this may be a graphics card issue. Please tell me your system specs (CPU, Graphics card, OS - 32 or 64bit).
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[FONT=Trebuchet MS]64-Bit Windows 7 OS[/FONT]
[FONT=Trebuchet MS]AMD Radeon™ HD 7640G[/FONT]
[FONT=Trebuchet MS]6 GB DDR3 Memory[/FONT]
 
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